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A novel method for determining input capacitance of power MOSFETs is proposed. Through measurements of gate charge transfer trajectories during switching, gate-source capacitance and drain-gate capacitance are determined. The capacitance models obtained by the proposed method simulate switching waveforms accurately and reduce timing errors by more than 16 times when compared to the conventional model...
The relentless technology scaling calls for reduced supply voltage for dynamic power suppression. On the other hand, transistor threshold voltage cannot be scaled at the same pace to avoid excessive leakage power. Consequently, the noise margin is significantly reduced, leading to the deployment of various noise management systems that handle runtime voltage emergencies. Most of these systems rely...
A DC-DC boost converter is fabricated using a SiC MOSFET and the characteristics are analyzed with SPICE simulation. We use a device model based on surface potential for SiC MOSFET, which was proposed this year by our group. It is found that the SPICE simulation well explains the experimental waveforms of the fabricated boost converter even at very high frequencies of 1–5 MHz. This result suggests...
A Next generation medium voltage Cubicle type Vacuum Insulated Switchgear (C-VIS) has been to deliver high reliability for electric power systems. A composite insulation without SF6 gas is applied to the C-VIS, and realizes environmentally friendly system with compact equipment size. The movable electrode in the double-break three-position vacuum switch is connected to the vacuum and air insulating...
This study investigates the influence of an axial magnetic field on current interruption performance of vacuum interrupters. The authors focused on axial magnetic flux densities at current peak and current zero of an alternating short-circuit current. An axial magnetic flux density at current peak is commonly understood to be important to stabilize arc plasma between electrodes. The authors considered...
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